A compound of formula (I) (I) wherein R is H; Ar is an aromatic group selected from phenyl; X is a phenyl group; R′ H or C1-C4 alkyl; each R1 is independently H or C1-C4 alkyl; and pharmaceutically acceptable salts thereof.
化合物的式(I),其中R是H;Ar是从
苯基选择的芳香基;X是
苯基;R′是H或C1-C4烷基;每个R1独立地是H或C1-C4烷基;以及其药学上可接受的盐。